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Balance Sheet Details - Schedule of Inventory (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Inventory Disclosure [Abstract]      
Raw materials $ 6,635 $ 10,112  
Work in process 12,571 20,604  
Finished goods 5,762 8,316  
Total inventory $ 24,968 $ 39,032 $ 10,108